LM4802B - Audio Power Amplifier

Product Overview

National Semiconductor

Part number	LM4802B
Manufacturer	National Semiconductor
File Size	1.20 MB
Description	Audio Power Amplifier
Datasheet	LM4802B Datasheet
Additional preview pages of the LM4802B datasheet.

The LM4802B integrates a Boost Converter with an Audio Power Amplifier to drive Ceramic Speakers in portable applications.

When powered by a 3V supply, it is capable of forcing 12Vp-p across a 2µF + 30Ω bridge-tied-load (BTL) with less than 1% THD+N.

a low-power consumption shutdown mode. Additionally, the LM4802B features an internal thermal shutdown protection mechanism. The LM4802B contains advanced pop & click circuitry that eliminates noises which would otherwise occur during turn-on and turn-off transitions. The LM4802B is unity-gain stable. Its gain is set by external resistors. Key Specifications j Quiescent Power Supply Current j BTL Voltage Swing 12mA (typ) (2µF + 30Ω load, 1% THD+N, VDD = 3V) j Shutdown Current 12Vp-p (typ) 2µ.

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Published: Mar 22, 2005 |